glwidget.cpp Example File
opengl/2dpainting/glwidget.cpp
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** Copyright (C) 2006-2006 Trolltech ASA. All rights reserved.
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** This file is part of the example classes of the Qt Toolkit.
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#include <QtGui>
#include "glwidget.h"
#include "helper.h"
GLWidget::GLWidget(Helper *helper, QWidget *parent)
: QGLWidget(QGLFormat(QGL::SampleBuffers), parent), helper(helper)
{
elapsed = 0;
setFixedSize(200, 200);
}
void GLWidget::animate()
{
elapsed = (elapsed + qobject_cast<QTimer*>(sender())->interval()) % 1000;
repaint();
}
void GLWidget::paintEvent(QPaintEvent *event)
{
QPainter painter;
painter.begin(this);
painter.setRenderHint(QPainter::Antialiasing);
helper->paint(&painter, event, elapsed);
painter.end();
}